If johann lays 94 bricks on the bottom layer, how many bricks will he need to complete the first 30 layers?

a. 2,385
b. 2,435
c. 2,790
d. 2,820

Adj has a total of 1075 dance and rock songs on her system. the dance selection is 4 times the size of the rock selection. write a system of equations to represent the situation.

How many kilograms of a 5% salt solution and how many kilograms of a 15% salt solution must be mixed together to make 45kg of an 8% salt solution?

What is the value of x in the equation7x+2y=48 when y=3